Engine Faults; General; Trouble Shooting Table - Whisper Power W-SC3 User Manual

TROUBLE SHOOTING
PROBLEM
Generator voltage fluctuates.
Generator is not able to start an
electric motor
5.2

ENGINE FAULTS

Remove 3 Amp. fuse in the control panel
while working on the generator to prevent the
engine from starting.
5.2.1

General

Most electrical problems relating to Voltage or Frequency
are due to wrong engine speed.
Note that RPM and Hz are basically the same.
Use the problem solving table to find the cause. When
there is no obvious cause one can adjust the RPM (refer
to special procedures). The Digital Diesel Control system
will help to indicate failures and display causes.
When the engine is not cranking well starting problems
almost always originate from battery problems or poor
battery cable connections. When the engine is cranking,
well starting problems almost always originate from lack of
fuel or air bubbles in the fuel pipes.
5.2.2

Trouble shooting table

PROBLEM
Diesel engine fails to crank, the
starter makes clicking noises, or
the engine cranks very slowly
22
CAUSE
• Disturbances on the electrical system/
user side.
• Engine runs irregularly.
If the generator is unable to supply
enough power to start an electric
motor (230V), this is usually
because this motor draws too much
current during starting
CAUSE
• Almost certainly this is an electrical
problem in the connection between
battery and starter
• Starter battery switched "OFF".
• Starter
battery voltage
(battery too weak).
• Starter broken
• To thick engine lubricating oil.
SOLUTION
Check if electrical load is fluctuating
When engine runs irregularly refer to section:
"Engine runs irregularly".
Check the electric motor's current draw
required for starting. This should not exceed
70% of the rated generator output current. This
could be remedied by providing stronger
capacitors to the motor or using a "soft-start".
Inquire at your nearest Whisper Power dealer
or directly at the manufacturer, Whisper Power
in the Netherlands.
A failure code is displayed when a hardware failure at the
generator is detected.
failure code problem
COMMUNICATION Communication error between the
panel end the generator
LOW START BAT Starter battery voltage too low
ALTERNATOR No output battery charging voltage
EXHAUST TEMP Exhaust temperature is too high
WATER TEMP Coolant temperature is too high
OIL PRESSURE Oil pressure failure
LOW VOLTAGE Generator AC output voltage is too
low
HIGH CURRENT generator is in overload
FREQUENCY output frequency of the generator is
too low
SOLUTION
The problem must be an electric malfunction.
Check position of the battery switch and switch
"ON".
Check battery voltage. Recharge the battery.
insufficient
Inspect battery terminals and cables for a good
electrical connection (inspect against
corrosion, tattered wires, etc.)
During the normal starting process, the battery
voltage drops to 11V (with a fully charged
battery). If the voltage does not drop during
starting, the electrical connection is faulty. If
the battery voltage drops lower than 11V, then
the battery has been discharged too deep.
Repair the starter motor
Change oil for a lower viscosity.
January 2011 / W-SC3 Mobile / EN